Chamberlain Liftmaster 485LM Garage Door Openers Battery Backup

Easy DIY - Instructions for Battery Replacement

Replacing the battery for your garage door opener can be a straightforward task. Follow these simple steps to ensure you do it correctly:

1. Turn Off the Power: Begin by disconnecting the power supply to your garage door opener. This is a crucial safety measure to prevent any electrical accidents during the replacement process.

2. Remove the Battery Cover: Next, take a Phillips head screwdriver and use it to remove the battery cover located on the motor unit of the opener. Keep the screws in a safe place for reassembly later.

3. Dispose of the Old Battery: Carefully take out the old battery and dispose of it properly. It's important to dispose of batteries in accordance with local regulations due to their hazardous materials.

4. Insert the New Battery: Take your new battery and partially place it into the motor unit with the terminals facing outward. Make sure it is oriented correctly to facilitate proper connections.

5. Connect the Wires: Attach the red (+) wire from the motor unit to the positive terminal of the new battery, and connect the black (-) wire to the negative terminal. Ensure that the connections are secure to prevent any operational issues later on.

6. Replace the Battery Cover: Once the battery is connected, place the battery cover back onto the motor unit and tighten the screws with the Phillips head screwdriver.

7. Reconnect the Power: Finally, restore power to the opener. Your garage door should now function normally, even during a power outage, allowing you access whenever needed.

Additional Information

This guide refers to the LiftMaster 485LM battery backup system, compatibility with Chamberlain part number 4228, which is 100% OEM. The new production dates assure that you are getting fresh stock directly from LiftMaster’s factory.

This battery backup system is also compatible with various models from Sears and Home Depot. It's an excellent replacement part for all battery backup units that utilize a slide-in battery, such as models 385/855, as well as newer versions.

By following these instructions, not only will you ensure the functionality of your garage door opener, but you'll also have peace of mind during power outages. So, whether you’re returning from a long day at work or just heading out for a quick errand, a reliable garage door opener will be at your service. Enjoy the convenience that an efficient battery backup provides, and keep your day running smoothly no matter the circumstances.

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